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BR0104884A - Process for continuous pulp cooking - Google Patents

Process for continuous pulp cooking

Info

Publication number
BR0104884A
BR0104884A BR0104884-8A BR0104884A BR0104884A BR 0104884 A BR0104884 A BR 0104884A BR 0104884 A BR0104884 A BR 0104884A BR 0104884 A BR0104884 A BR 0104884A
Authority
BR
Brazil
Prior art keywords
digester
pulp
wash
cooking liquor
cooking
Prior art date
Application number
BR0104884-8A
Other languages
Portuguese (pt)
Other versions
BR0104884B1 (en
Inventor
Vidar Snekkenes
Lennart Gustavsson
Sven-Erik Olsson
Original Assignee
Kvaerner Pulping Tech
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kvaerner Pulping Tech filed Critical Kvaerner Pulping Tech
Publication of BR0104884A publication Critical patent/BR0104884A/en
Publication of BR0104884B1 publication Critical patent/BR0104884B1/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
    • D21C9/04—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents in diffusers ; Washing of pulp of fluid consistency without substantially thickening
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D21C3/24—Continuous processes

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Noodles (AREA)
  • Commercial Cooking Devices (AREA)

Abstract

The invention relates to a process for continuous cooking of wood chips at elevated pressure and temperature in a vertical digester (1) for production of chemically dissolved pulp. Fibre material and cooking liquor are introduced at the top of the digester and pulp is discharged from the bottom of the digester (1), via a line (20) in which the pulp is maintained at substantially the same pressure level, to a pressurized wash (7). More than 50% of the used cooking liquor (black liquor) which is extracted from the system in total is extracted from the wash filtrate of the pressurized wash. At the same time a small portion of the wash filtrate is also to be recirculated to the bottom of the digester as dilution liquid. The extraction is regulated so that a net co-current flow is established at the bottom of the digester. The invention permits increased production in overloaded digesters where substantial extractions of cooking liquor from the digester are made difficult by the increased pulp speed down through the digester. <IMAGE>
BRPI0104884-8A 2000-11-03 2001-10-30 process for continuously cooking wood chips at high pressure and high temperature. BR0104884B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0004050A SE0004050L (en) 2000-11-03 2000-11-03 Continuous boiling of pulp with net mid-stream flow in the bottom portion of the boiler

Publications (2)

Publication Number Publication Date
BR0104884A true BR0104884A (en) 2002-06-25
BR0104884B1 BR0104884B1 (en) 2012-12-11

Family

ID=20281710

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0104884-8A BR0104884B1 (en) 2000-11-03 2001-10-30 process for continuously cooking wood chips at high pressure and high temperature.

Country Status (9)

Country Link
US (1) US6605180B2 (en)
EP (1) EP1205597B1 (en)
JP (1) JP4886950B2 (en)
AT (1) ATE289641T1 (en)
BR (1) BR0104884B1 (en)
CA (1) CA2357864C (en)
DE (1) DE60109007T2 (en)
PT (1) PT1205597E (en)
SE (1) SE0004050L (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE517674E8 (en) * 2001-05-02 2015-10-20 Metso Paper Sweden Ab Method of washing liquid supply to boiling process for cellulose pulp
SE526432C2 (en) * 2002-07-03 2005-09-13 Kvaerner Pulping Tech Method and boiler for continuous boiling of raw material to cellulose pulp
US7168233B1 (en) * 2005-12-12 2007-01-30 General Electric Company System for controlling steam temperature
US7771565B2 (en) * 2006-02-21 2010-08-10 Packaging Corporation Of America Method of pre-treating woodchips prior to mechanical pulping
SE0702874L (en) * 2007-12-20 2009-06-09 Metso Fiber Karlstad Ab Process of manufacture of sulphate pulp in which hemicelluloses are recycled
US9777341B2 (en) * 2008-06-26 2017-10-03 Purdue Research Foundation Locally-regulated pressurized pretreatment of lignocellulosic biomass
SE539501C2 (en) * 2014-10-31 2017-10-03 Valmet Oy Method and arrangement for discharge dilution
CN114277590B (en) * 2021-12-31 2023-05-26 郑州运达造纸设备有限公司 Bridge-proof trough body of steaming bin

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3303088A (en) * 1963-04-19 1967-02-07 Lummus Co Continuous liquid-phase rapid pulping
US4123318A (en) * 1976-06-29 1978-10-31 Kamyr, Inc. Three-vessel treatment system
SE452343B (en) * 1984-02-22 1987-11-23 Billeruds Ab SET AND EQUIPMENT FOR CONTINUOUS CELLULOS COOKING
US5066362A (en) * 1987-12-01 1991-11-19 Kamyr, Inc. Extended delignification in pressure diffusers
US4975148A (en) * 1988-12-06 1990-12-04 Ahlstromforetagen Svenska Ab Cold blow system for batch production of pulp
US5203963A (en) * 1991-10-21 1993-04-20 A. Ahlstrom Corporation Continuous treatment of small chips
SE501848C2 (en) * 1992-11-18 1995-06-06 Kvaerner Pulping Tech Method to cook pulp continuously at constant temperature
SE500455C2 (en) * 1992-11-18 1994-06-27 Kamyr Ab Method of continuous cooking under elevated pressure and temperature of fiber material in a vertical digester
WO1994024362A1 (en) * 1993-04-20 1994-10-27 Kamyr Ab Method of continuously cooking pulp
SE501369C2 (en) * 1994-02-23 1995-01-23 Kvaerner Pulping Tech Handling of twig during continuous cooking
SE505528C2 (en) * 1995-04-28 1997-09-15 Kvaerner Pulping Tech Impregnation of chips with hot black liquor in a continuous single vessel system
US6123807A (en) * 1997-02-18 2000-09-26 Kvaerner Pulping Ab Method for the continuous cooking of pulp

Also Published As

Publication number Publication date
SE0004050D0 (en) 2000-11-03
JP2002146690A (en) 2002-05-22
CA2357864A1 (en) 2002-05-03
SE515971C2 (en) 2001-11-05
BR0104884B1 (en) 2012-12-11
DE60109007T2 (en) 2006-04-06
JP4886950B2 (en) 2012-02-29
EP1205597B1 (en) 2005-02-23
US6605180B2 (en) 2003-08-12
DE60109007D1 (en) 2005-03-31
EP1205597A1 (en) 2002-05-15
US20020079070A1 (en) 2002-06-27
CA2357864C (en) 2009-05-19
SE0004050L (en) 2001-11-05
ATE289641T1 (en) 2005-03-15
PT1205597E (en) 2005-07-29

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Legal Events

Date Code Title Description
B25D Requested change of name of applicant approved

Owner name: METSO FIBER KARLSTAD AB (SE)

Free format text: ALTERADO DE: KVAERNER PULPING AB

B25A Requested transfer of rights approved

Owner name: METSO PAPER SWEDEN AB (SE)

Free format text: TRANSFERIDO POR INCORPORACAO DE: METSO FIBER KARLSTAD AB

B06A Patent application procedure suspended [chapter 6.1 patent gazette]
B09A Decision: intention to grant [chapter 9.1 patent gazette]
B16A Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]

Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 11/12/2012, OBSERVADAS AS DEMAIS CONDICOES LEGAIS.

B25E Requested change of name of applicant rejected
B25H Request for change of headquarter rejected

Free format text: INDEFERIDO O PEDIDO DE ALTERACAO DE ENDERECO CONTIDO NA PETICAO 020110029386 DE 28/03/2011, CONFORME DISPOSTO NO ART. 59 DA LEI 9279/96 DE 14/05/1996, POR TER SIDO CONTEMPLADO NO DESPACHO 25.1 PUBLICADO NA RPI 2118 DE 09/08/2011.

B21F Lapse acc. art. 78, item iv - on non-payment of the annual fees in time

Free format text: REFERENTE A 17A ANUIDADE.

B24J Lapse because of non-payment of annual fees (definitively: art 78 iv lpi, resolution 113/2013 art. 12)

Free format text: EM VIRTUDE DA EXTINCAO PUBLICADA NA RPI 2486 DE 28-08-2018 E CONSIDERANDO AUSENCIA DE MANIFESTACAO DENTRO DOS PRAZOS LEGAIS, INFORMO QUE CABE SER MANTIDA A EXTINCAO DA PATENTE E SEUS CERTIFICADOS, CONFORME O DISPOSTO NO ARTIGO 12, DA RESOLUCAO 113/2013.